After the danger involving the acid has passed, the crew returns to the Autodoc for further discussion. While providing a hint at Kane's forthcoming fate, it was eliminated as being an extraneous conversation.

Alien 5 being a prequel confirmed-:
http://www.totalfilm.com/news/alien-5... ''It's actually a prequel movie that will explain the origins of the space jockey spaceship.''

Plot:
The story begins when the crew of the commercial transport ship Nostromo receive a transmission which might be of nonhuman origin.

They land on the deserted moon Acheron LV-426 and find a derelict spaceship with a dead alien and many large eggs.

Directed by Ridley Scott
© 20th Century Fox

I recommend the High Quality version